Crankless cam driven piston engine
OwnerBrayton B. Paulinventor
Life of this patent
Estimating the term…
Abstract
A lightweight crankless piston engine utilizes cam action to produce two piston strokes for one revolution of the engine output shaft, which shaft does not pierce the piston or the combustion chamber. Ease of assembly is enabled. One section of the cam is embodied in the cylinder liner and the opposing cam section is an extension of the output shaft housing. In its simplest mode, the engine is ported for fuel-air induction and exhaust. Cam induced piston rotation directly drives the output shaft while piston reciprocation is allowed without influencing such shaft.
Claims8
A crankless engine comprising a block and head unit having a bore opening through a surface of the block remote from said head, fixed liner means in said bore defining therein an approximately sinusoidal annular cam slot, a piston mounted within said liner and having follower means engaging said annualar cam slot for reciprocation and rotation responsive to the configuration of said cam slot, and engine output shaft projecting into the interior of the piston and being concentric to and rotationally keyed to the piston and being rotatably supported on the end of the block and head unit remote from said head, said liner means and said unit having exhaust passage means, said shaft having fuel induction passage means, and said liner having bypass induction means communicating with a combustion chamber of the engine when said piston is near the bottom of its stroke for uncovering said exhaust passage means and said piston and output shaft defining a chamber within the body of the piston whose volume is determined by the axial position of the piston, said block having a radial port remote from said head and said fuel induction passage means comprising an axial bore through said output shaft communicating with said chamber within the body of the piston and said axial bore further communicating with a radial passage aligning with said radial port in said block only when the piston is substantially in an axial position most proximate to said head wherein the volume of said chamber within the body of the piston is maximum during each cycle of the engine.
A crankless engine comprising a block having a bore and exhaust passage means, means on one end of the block forming a combustion chamber therewith and including ignition means, a shaft housing on the other end of the block having a fuel induction passage adapted to deliver an air-fuel charge to the engine, a liner fixed in the bore of the block and having an exhaust port in registration with said exhaust passage means and also having a bypass port in its side wall, a cam extension on said liner within said bore of the block, a coacting cam extension on said shaft housing and extending into said bore in spaced relationship to the liner cam extension and forming therewith a cam track in said block, a piston mounted within said liner for simultaneous reciprocation and rotation responsive to an explosion of fuel in said combustion chamber, follower means on the piston engaging said cam track, and an engine output shaft rotatably engaged with said shaft housing and having a telescoping lost motion connection with said piston whereby rotation of the piston directly drives said shaft in rotation while the reciprocation of the piston is allowed without influencing said shaft, and said shaft having a bore and having an intake port communicating with the bore and adapted during rotation of the shaft to register cyclically with said fuel induction passage, said shaft having another port communicating with the shaft bore adapted to deliver a fuel charge through said bypass port and into the combustion chamber.
Dependencies are inferred from the claim text.